JPH08133628A - Main rope adjusting device for hydraulic elevator - Google Patents

Abstract

PURPOSE: To provide a main rope adjusting device for a hydraulic elevator that can easily adjust the length or tension of a main rope without using large- scale equipment. CONSTITUTION: A simple rod holder 10 is engaged with the rope socket of each simple rod 4, and a jack base holder 13 is engaged with a jack base 3. The simple rod holder 10 and the jack base holder 13 are connected to each other by a guide rod 12 with a nut 11, and the nut 11 is turned by a spanner to absorb the load of a car applied to the simple rod 4. In this state, the tension or length of a main rope is adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main rope adjusting device for a hydraulic elevator for adjusting the length and tension of the main rope of the hydraulic elevator.

[0002]

2. Description of the Related Art Generally, a hydraulic elevator is constructed by hanging a middle of a plurality of main ropes fixed at one end on a plunger pulley and connecting a car to the other end of the main rope through a thimble rod. When tightening the adjustment nut of the thimble rod to adjust the length and tension of the main rope, if the car load is suspended on the thimble rod, a large force is required to tighten the adjustment nut. Must be reduced.

Therefore, in the conventional hydraulic elevator, in order to reduce the load of the car on the thimble rod, a plurality of main ropes are divided into at least two groups as described in JP-A-5-5036. The main rope hydraulic traction device connected to the thimble rod of the first group main rope makes the apparent length of the main rope of the first group shorter than that of the main rope of the second group. The main rope was used to support the car, and in this state the length and tension of the main ropes of the second group were adjusted.

[0004]

However, since the length and tension of the main rope in the conventional hydraulic elevator have been adjusted by using the main rope hydraulic traction device as described above, a large-scale hydraulic unit or the like has to be used. It is necessary to bring the device into the pit, and in order to divide the main rope into two groups, it is necessary to perform the adjustment work twice alternately. Furthermore, when the adjustment range of the thimble rod is exceeded, the main rope must be cut down.

An object of the present invention is to provide a main rope adjusting device for a hydraulic elevator, which can easily adjust the length and tension of the main rope without using large-scale equipment.

[0006]

To achieve the above object, the present invention provides a main rope adjusting device for a hydraulic elevator, in which a plurality of main ropes are connected between a car and a jack stand via thimble rods. In the above, a thimble rod holder attached to the thimble rod on the side of the jack stand and a jack stand holder engaged with the jack stand are provided, and a nut is tightened between the thimble rod holder and the jack stand holder. It is characterized in that a connecting means connected so as to be lifted is provided.

[0007]

In the main rope adjusting device of the hydraulic elevator according to the present invention, the thimble rod holder and the jack fixing metal fitting are connected by the connecting means so that they can be tightened by the nut as described above. , It is possible to easily bring the thimble rod holder and the jack fixing bracket close to each other to apply tension to the main rope and adjust the length, and bring in large-scale equipment such as a hydraulic unit into the pit as before. With no need to
You can easily adjust the length and tension of all main ropes at once.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is a side view of a hydraulic elevator using a main rope adjusting device for a hydraulic elevator according to an exemplary embodiment of the present invention. The other end of the main rope 5, one end of which is fixed to the jack base 3 via the thimble rod 4, is wound around the jack pulley 2 and then connected to the car 6. The car 6 normally moves up and down along the guide rails 7 by the hydraulic pressure of the jack 1 and is stopped by grasping the guide rails 7 by operating the safety device 8 in an emergency. Is configured.
Therefore, since the load of the car 6 is always suspended on the main rope 5, the main rope 5 generated after the hydraulic elevator is installed.
However, since the hydraulic elevator performs various controls at the position of the car 6, the extension of the main rope 5 causes the jack 1 to rise by an amount greater than the normal value. At this time, if the main rope 5 stretches a lot,
Since the stroke limit of the jack 1 may be exceeded when the car 6 stops at the top floor, the hydraulic elevator is provided with a safety device 9 for detecting an overstroke of the jack 1. When the safety device 9 is activated or when the length of the main rope exceeds a specified value due to elongation at the time of inspection, it becomes necessary to adjust the length of the main rope 5.

As shown in FIG. 4, which is an enlarged sectional view of the essential portion of FIG.
c and the rope clip 4a are used to fix the main rope 5, one end of the rod 4d is fixed to the rope socket 4b with a pin 4j, and a threaded portion is formed at the other end of the rod 4d. 4g, the adjustment nut 4h and the lock nut 4i are attached to the jack stand 3 via the spring seat 4f. To adjust the length and tension of the main rope 5,
The adjustment nut 4h can be used within the range of the threaded portion of the rod 4d.

However, when adjusting the length and tension of the main rope 5, the adjusting nut 4 of the thimble rod 4 is adjusted.
Since it is necessary to remove the load applied to h, the main rope adjusting device as shown in the front view and side view of the jack side main rope fixing portion in FIGS. 1 and 2 is used. This main rope adjusting device has a thimble rod holder 10 engaged with a rope socket 4b of a thimble rod 4, and this thimble rod holder 10 is a connecting means of a guide rod 12 having screw portions at both ends. The upper part is supported by a low-friction nut 11, and the lower end of the guide rod 12 is connected to a plate 14 which is a jack holder provided on the lower surface of the jack holder 13 as shown in FIG. As shown in the perspective view of FIG. 5, the above thimble rod holder 10 has a groove 10c having the same slope as the rope socket 4b of the thimble rod 4 and a hole 10d through which the guide rod 12 is inserted. 4b has a structure that can be split so that it can be connected so as to prevent it from moving downward, and a bolt 10e is provided between the split thimble rod holders 10 without removing the main rope 5. It can be assembled and attached to the sprocket 4b portion. The low friction nut 1 shown in FIGS.
As shown in the cross-sectional view of FIG. 7, 1 is a steel member which is a means for reducing friction between a nut portion 11a screwed to a guide rod 12 and a contact portion 11b arranged on the thimble rod holder 10 side. The ball 11c is inserted. Therefore, the nut portion 11a is directly attached to the thimble rod holder 10.
Since the frictional force is significantly reduced by the steel balls 11c compared with the case where the is arranged, it is possible to generate a large axial force even with the same tightening force as a normal nut, and by tightening with a spanner etc. The thimble rod 4 on which the load of the car 6 is suspended can also be pushed down. As the low-friction nut 11 is tightened, the load of the car 6 suspended on the adjusting nut 4h of the thimble rod 4 shown in FIG. 4 is changed to the thimble rod holder 1 shown in FIGS.
0, the guide rod 12, the plate 14, and the jack stand holder 13 are received by the jack stand 3, so that the load hanging on the adjusting nut 4h is removed and it can be easily adjusted.

There is no problem if the adjustment range due to the elongation of the main rope 5 and the variation in tension is within the adjustment range of the thimble rod 4, but if it exceeds the adjustment range, the extension member 15 shown in FIG. 1 is used. As shown in the perspective view of FIG. 6, this extension member is composed of a split pipe 15b having a notch for attaching to the rod 4d of the thimble rod 4 and seats 15a and 15c also having the notch. 4 can be attached without disassembling. That is, as shown in the drawing, after fitting each into the rod 4d from the notch, the stoppers 15d provided on the opposite sides of the seats 15a and 15c are fitted to the ends of the split pipe 15b. At this time, the cutouts of the seats 15a and 15c are arranged at positions of, for example, 180 degrees so as to be discontinuous with the cutouts of the split pipe 15b.
Since 5d is fitted in the notch of the split pipe 15b,
Rotation between them is blocked, and the rod 4d of the split pipe 15b is blocked.
It prevents it from coming off. In this way, when adjusting the length and tension of the main rope of a hydraulic elevator, it is easy to do without bringing large-scale equipment such as a hydraulic unit into the pit, and the length and tension of all main ropes can be adjusted at once. The work can be performed and the main rope can be omitted.

FIG. 8 is a sectional view showing a main portion of a main rope adjusting device for a hydraulic elevator according to another embodiment of the present invention. In this embodiment, a low friction washer 16 is formed between the thimble rod holder 10 and the nut 11. This low-friction washer 16 is a means for reducing friction between the contact portion 16b arranged on the thimble rod holder 10 side and the contact portion 16a arranged on the nut 11 side.
6c is inserted, and the same effect as the low friction nut 11 according to FIG. 7 can be obtained.

9 and 10 are a front view and a side view showing a main rope adjusting device of a hydraulic elevator according to another embodiment of the present invention. In the embodiment shown in FIGS. 1 and 2,
While all of the main ropes 5 are held by using the thimble rod holder 10, in the embodiments shown in FIGS. 9 and 10, the same parts are designated by the same reference numerals and detailed description thereof is omitted. The main difference is that one or several main ropes 5 are held by the thimble rod holder 10. As can be seen from this embodiment, the number of main ropes 5 to be held by the thimble rod holder 10 is not limited, and substantially the same effect as the previous embodiment can be obtained.

[0014]

As described above, in the main rope adjusting device for a hydraulic elevator according to the present invention, the thimble rod holder and the jack stand holder are attached to the thimble rod and the jack stand, respectively. Since the holders are connected by a connecting means having a nut, it is possible to easily adjust the tension and length of all the main ropes at once using a spanner or the like,
It is not necessary to bring large-scale equipment such as a hydraulic unit into the pit as in the conventional case.

[Brief description of drawings]

FIG. 1 is a front view showing a main rope adjusting device of a hydraulic elevator according to an embodiment of the present invention.

2 is a side view of the main rope adjusting device of the hydraulic elevator shown in FIG. 1. FIG.

FIG. 3 is a side view showing a general hydraulic elevator.

4 is a cross-sectional view of a thimble rod that is a main part of the hydraulic elevator shown in FIG.

5 is a perspective view of a rope socket holder in the main rope adjusting device of the hydraulic elevator shown in FIG. 1. FIG.

6 is a perspective view of an extension member in the main rope adjusting device of the hydraulic elevator shown in FIG. 1. FIG.

7 is a cross-sectional view of a low-friction nut in the main rope adjustment device for the hydraulic elevator shown in FIG.

FIG. 8 is a sectional view showing a main part of a main rope adjusting device for a hydraulic elevator according to another embodiment of the present invention.

FIG. 9 is a front view showing a main rope adjusting device of a hydraulic elevator according to still another embodiment of the present invention.

10 is a side view of the main rope adjusting device of the hydraulic elevator shown in FIG. 9. FIG.

[Explanation of symbols]

 1 jack 3 jack stand 4 thimble rod 5 main rope 6 car basket 10 rope socket retainer 11 low friction nut 12 guide rod 13 jack stand retainer 14 plate 15 extension member 16 low friction washer

Front page continuation (72) Inventor Koji Kubota 1-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside Hitachi Building System Service Co., Ltd.

Claims (7)

[Claims] 1. A main rope adjusting device for a hydraulic elevator, wherein a plurality of main ropes are connected between a riding basket and a jack stand by thimble rods, the thimble rod being attached to the thimble rod on the jack stand side. A holding tool and a jack stand holder engaged with the jack stand are provided, and a connecting means is provided for connecting the thimble rod holder and the jack stand holder so that they can be tightened with a nut. Main rope adjustment device for hydraulic elevators. 2. The main rope adjusting device for a hydraulic elevator according to claim 1, wherein the thimble rod holder is engaged with a rope socket of the thimble rod. 3. The hydraulic system according to claim 1, wherein the connecting means has a low-friction nut on either one of the thimble rod holder and the jack base holder. Main rope adjustment device for elevators. 4. The hydraulic system according to claim 1, wherein the connecting means has a low-friction washer between one of the thimble rod holder and the jack base holder. Main rope adjustment device for elevators. 5. The main rope adjustment for a hydraulic elevator according to claim 1, wherein the thimble rod holder is provided in engagement with the thimble rod of at least one of the main ropes. apparatus. 6. The main rope adjusting device for a hydraulic elevator according to claim 1, wherein an extension member is arranged between the jack base and the thimble rod. 7. The split member according to claim 6, wherein the extension member has a split pipe having a notch to be inserted into the thimble rod, and is fitted to both ends of the split pipe to seal both ends of the notch. A main rope adjusting device for a hydraulic elevator, which is equipped with a seat.